[Bug c/13427] New: PGM string doesn't properly with strcpy variable index array

["ken at realtronix dot net" <gcc-bugzilla at gcc dot gnu dot org>]

#include <avr/io.h>
#include <avr/pgmspace.h>
#include <string.h>

const char foo[] PROGMEM = "foo";
const char bar[] PROGMEM = "bar";

PGM_P  Langs[2] PROGMEM = {foo, bar};

int main(void)
{
  unsigned char i;
  char buf[2][5];
  
  //strcpy_P works fine with constant index
  strcpy_P(buf[0], Langs[0]);  //correctly copy 'foo'
  strcpy_P(buf[1], Langs[1]);  //correctly copy 'bar'
  
  //but strcpy_P copy char from wrong address if use variable indexing
  for (i=0; i<2; i++)
    strcpy_P(buf[i], Langs[i]);  //copy garbages!!!

  return 1;
}

-- 
           Summary: PGM string doesn't properly with strcpy variable index
                    array
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ken at realtronix dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13427